40% lifetime commission for a SaaS affiliate program — too much?

I'm currently working on the affiliate strategy for a new SaaS product and considering offering a 40% lifetime recurring commission.

My thinking is that, as an early-stage product without a large distribution channel yet, I'd rather give affiliates a much stronger incentive and reach customers I probably wouldn't be able to reach on my own.

For founders who have already run affiliate programs with recurring commissions:

Did offering a higher commission actually help you attract better affiliates and generate more sales?

Would you choose a 20–30% commission and keep higher margins, or offer 40% lifetime to make the affiliate program significantly more attractive?

And where did you find your best affiliate partners — existing customers, direct outreach, YouTube creators, SEO bloggers, affiliate networks, or somewhere else?

I'd especially love to hear from people who have experimented with different commission rates and seen a measurable difference in the results.